C TOKENS

C TOKENS:-

                      TOKENS ARE THE GROUP OF CHARACTER THAT ARE USED FOR REPRESENTING AN IDENTITY . IN C LANGUAGE FOLLOWING TYPES OF TOKENS ARE USED.

• IDENTIFIER
• KEYWORDS 
• CONSTANT 
• OPERATORS 

i.) IDENTIFIER:-

                              IDENTIFIER ARE THE NAMES THAT ARE USED FOR IDENTIFYING AN ENTITIES .
                   IDENTIFIER ARE THE NAMES WHICH ARE GIVEN TO VARIOUS PROGRAMS ELEMENTS SUCH AS VARIABLES , FUNCTIONS AND ARRAYS . IDENTIFIER MUST BE UNIQUE . ALSO REMEMBER , IDENTIFIER NAME MUST BE DIFFERENT FROM THE KEYWORDS . YOU CANNOT USE (int) IS A KEYWORD .

SOME MAIN POINTS OF IDENTIFIER ARE:-

* IDENTIFIER CONSIST OF BOTH LETTERS AND DIGITS .
* AN IDENTIFIER CONSIST OF ALPHABETS , DIGITS AND UNDERSCORE
* IT MUST NOT START WITH DIGITS .
* C IS CASE SENSITIVE .

KEYWORDS:-

                         IN C LANGUAGE  SOME WORDS ARE RESERVE FOR SPECIFIC TASK THEY CARRY SPECIAL MEANING FOR C COMPILER .
KEYWORDS ARE PART OF SYNTAX AND THEY CANNOT BE USED AS AN IDENTIFIER . KEYWORDS HAVE STANDARD PREDEFINED MEANING .

for example:-  int money
here (int)  is keyword and money is a variable type of integer .

HERE SOME KEYWORDS ARE -

OPERATORS: YOU CAN READ ABOUT OPERATORS IN DETAIL .

VARIABLE:-

                     VARIABLES ARE MEMORY LOCATIONS , WHICH HOLD SOME VALUE IN THEM . THEY ARE ALWAYS ASSIGN A UNIQUE NAME FOR IDENTIFICATION .

* VARIABLES IS AN IDENTIFIER IS USED TO REPRESENT SOME SPECIFIC TYPE OF INFORMATION WITHIN DESIGNATED PORTION OF THE PROGRAM .

* VARIABLE IS AN IDENTIFIER THAT IS USED TO REPRESENT SINGLE DATA ITEM .

for example:-

int a;
a=6;
here 'a' is a variable .

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PREPROCESSOR

C FUNCTIONS

CALLING FUNCTIONS

PRIMARY DATA TYPES

SECONDARY DATA TYPES